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|Title:||N-(4-Hydroxy- 3-methoxybenzylidene) hydrazine carbothioamide as a selective and sensitive reagent for the rapid spectrophotometric determination of osmium(VI)|
|Authors:||Gowda, H Sanke|
Ahmed, S Maqbool
Raj, J B
|Abstract:||N-(4-Hydroxy- 3-methoxybenzylidine)hydrazine carbothioamides is proposed as a selective and sensitive reagent for the rapid spectrophotometric determination of osmium (VI). The reagent forms a brownish-yellow complex with osmium(VI) at room temperature in 1-4M acetic acid medium. The complex exhibits absorption maximum at 364 nm with a molar absorptivity of 1.2 x 105 dm3 mol-1 cm-1. Beer's law is valid over the concentration range of 0.02-1.2 ppm of osmium(VI) with an optimum concentration range of 0.1-1.1 ppm. The apparent stability constant of the complex is log K = 6.79 ± 0.1 at 28°C. The method has been used for the determination of osmium in sy-serskite.|
|Appears in Collections:||IJC-A Vol.29A(01) [January 1990]|
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